Originally Posted by tejus.k.v
Well there have been many people who have flashed Defy+ ROMs on their Defy and vice versa. They haven't reported any problems. If radio hardware was different my guess is that even baseband switcher wouldn't have worked, right? But I always just assumed that all handsets of Defy, regardless of where they are sold, have the ability to use any of the types of networks ("Quad band" right?). Anyway this is all just speculation...as long as my defy works on my network, I'm happy
EDIT: Even within just Defy or just Defy+, if radios were incapable of tuning into the HSDPA frequencies other than of that region, then there would have been many complaints from people who have flashed different region's SBF's..so my (inexperienced) guess is that Defy can connect to all HSDPA bands. Just this afternoon I read an article somewhere about some US carrier releasing an update to a couple of their android handsets to make them quadband...until now they were marketed as dual band and non global. Maybe same for Defy?
If I read the specs of the Defy, right from Motorola's site, I understand:
WCDMA 900/2100 <--> At least dualband for WCDMA
GSM 850/900/1800/1900 <--> Quadband for GSM
HSDPA 7.2 Mbps (Category 7/8), EDGE Class 12, GPRS Class 12, HSUPA 2.0 Mbps
So, I understand that this particular Defy model is only Quadband for GSM, while it is only Dualband for WCDMA. Although I remember there is a Defy in some country with 3 bands for WCDMA. I can't remember which one though.
Just found that in Spain
it is stated as triband for WCDMA: